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Lobo RE, Orrillo PA, Ribotta SB, de Valdez GF, García MS, Cabello JCR, Torino MI. Structural characterization of a homopolysaccharide produced by Weissella cibaria FMy 2-21-1 and its potential application as a green corrosion inhibiting film. Int J Biol Macromol 2022; 212:193-201. [PMID: 35594939 DOI: 10.1016/j.ijbiomac.2022.05.105] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 05/09/2022] [Accepted: 05/14/2022] [Indexed: 11/26/2022]
Abstract
Steel corrosion is a global issue that affects safety and the economy. Currently, the homopolysaccharide (HoPS) structure of a novel lactic acid bacterium (LAB) is under study, as well as its application as a green corrosion inhibitor. Weissella cibaria FMy 2-21-1 is a LAB strain capable of producing HoPS in sucrose enriched media. The isolated and purified HoPS was characterized by different spectroscopic analyses as a linear α-1,6 dextran adopting a random coil conformation, with high molecular weight and extended size in water. The polysaccharide showed a semi-crystalline organization, which is a requirement for film formation. Its biocoating showed a grainy network structure, with a slightly lesser hydrophobic role in the aqueous environment than in the ionic one. The electrochemical measurements of the steel-HoPS coating showed that the biopolymer layer acts as an anodic-type corrosion inhibitor, with high resistance to corrosion by water and with chloride ions which prevent pitting, a corrosion process typical of bare steel. Few reports have cited the application of LAB HoPS as corrosive coating inhibitors. This work is the first to explore the influence of a structurally characterized dextran from Weissella cibaria strain as a potential steel corrosion inhibitor in ionic environments.
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Affiliation(s)
- René Emanuel Lobo
- Centro de Referencia para Lactobacilos (CERELA)-CCT CONICET NOA Sur, Batalla de Chacabuco 145, San Miguel de Tucumán 4000, Tucumán, Argentina.
| | - Patricio Andrés Orrillo
- Instituto de Química del Noroeste Argentino (INQUINOA) - Universidad Nacional de Tucumán (UNT) - CCT CONICET NOA Sur, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, UNT, Batalla de Ayacucho 471, San Miguel de Tucumán 4000, Tucumán, Argentina.
| | - Susana Beatriz Ribotta
- Instituto de Química del Noroeste Argentino (INQUINOA) - Universidad Nacional de Tucumán (UNT) - CCT CONICET NOA Sur, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, UNT, Batalla de Ayacucho 471, San Miguel de Tucumán 4000, Tucumán, Argentina.
| | - Graciela Font de Valdez
- Centro de Referencia para Lactobacilos (CERELA)-CCT CONICET NOA Sur, Batalla de Chacabuco 145, San Miguel de Tucumán 4000, Tucumán, Argentina.
| | - Mercedes Santos García
- BIOFORGE (Group for Advanced Materials and Nanobiotechnology), University of Valladolid, CIBER-BBN, 47011 Valladolid, Spain.
| | - José Carlos Rodríguez Cabello
- BIOFORGE (Group for Advanced Materials and Nanobiotechnology), University of Valladolid, CIBER-BBN, 47011 Valladolid, Spain.
| | - María Inés Torino
- Centro de Referencia para Lactobacilos (CERELA)-CCT CONICET NOA Sur, Batalla de Chacabuco 145, San Miguel de Tucumán 4000, Tucumán, Argentina.
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Superhydrophobic copper in biological liquids: Antibacterial activity and microbiologically induced or inhibited corrosion. Colloids Surf B Biointerfaces 2020; 185:110622. [DOI: 10.1016/j.colsurfb.2019.110622] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 10/14/2019] [Accepted: 10/28/2019] [Indexed: 12/16/2022]
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